Monday, 24 December 2012

Cranes

One frosty morning last
week, I was out in the Fens again looking at Cranes.The nesting pair were back on territory,
after some weeks of touring the Fens.Last year’s youngster was still in tow but will surely be given the boot
as spring approaches. Cranes have had their most successful year in the UK
since returning as a breeding bird, with up to 24 pairs rearing at least 13
youngsters.The Fens offshoot of the
Broads population now seems well established

The winter food of these
birds is a mix of agricultural remains and more natural foods from wet
grasslands.The Cranes had been feeding extensively
on beet tops earlier in the winter. One family party were feeding in a
maize strip, picking cobs off the standing crop.Spuds seem to be a good food also.
Spuds left in the ground after harvest may be favoured as they are fresher, but
good farming practice usually leaves few available for the birds. Piles
of dumped spuds have been used to attract birds but it appears Cranes prefer
them fresh, so replenishing stocks may be the best approach.The birds I was watching were feeding on
waste grain put out for them.

Winter roost sites are
important, with birds favouring shallow flooded areas. Ideally they will be
close to feeding areas but birds will frequently fly some distance to a
suitable roost.

So if we want to attract
Cranes, or keep them in a particular area for viewing, why not grow small areas
of sacrificial crops - spuds or maize, adjacent to wet grassland etc. Also, ensure that suitable winter roost sites
are present. Shallow flooding of
some cropped land would be beneficial. These techniques are well known to attract
cranes and geese in the USA and such management would also benefit other
farmland birds.

A grizzled old ecologist/birder, usually to be found roaming around the Lee Valley and occasionally further afield. Fortunate to be involved in the management of some of the UK's finest nature reserves and always looking for ways of improving them for birds.